View on LOZ Suggested Retail: $649.95. . Alpinestars Unisex-Adult Tech 10 AMS21 LE Boots, Size 11. The revolutionized Tech 10 MX boot incorporates innovative materials and technology in a completely new design for a lighter, more anatomically profiled performer. This CE certified boot promotes core stability and flex via a biomechanical pivot while offering excellent ankle protection. The boot chassis has been designed to give complete feel and optimized interaction with bike controls, while the innovative buckle system allows easy, precise closure. 7 CALENDAR DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. 7 CALENDAR DAY STORAGE IS ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.